2008-2014 Challenger RT 5.7 V8 2.5" Cat-back Exhaust w/RacePro Mufflers Fits 2008-2014 Dodge Challenger R/T V8's except SRT-8 Includes X-pipe, slip-fit tailpipes, stainless band clamps, hangers, insulators, double box tips & RacePro mufflers No cutting or welding is required to install onto applicable vehicles Increases horsepower by 10-18 & adds the RacePro sound to your exhaust Pypes Performance Exhaust part number SCM20R